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If you are HBsAg Positive for more than six months after your diagnosis of Hepatitis B
then you are considered to have Chronic form of Hepatitis B.
If your HBsAg levels are negative with in 6 months of your diagnosis , then you had an acute form of Hepatitis B infection.
Just check your HbSAg levels i.e HBs Antigen levels by september 2011 and if you are positive - you are a chronic carrier else you had an acute episode.